Abstract: A wearable pulse oximetry device and associated methods are provided. In some embodiments, the device includes at least two light sources having different wavelengths and at least one detector responsive to the different wavelengths. The device also includes a structure adapted to fixate at a distal end of the wearer's ulna bone at a fixated area. The light sources having different wavelengths and the at least one detector are fixed within, or adjacent to, the structure such that when the structure fixates at the fixated area the light sources and the at least one detector are positioned adjacent to the distal end of the ulna, and the at least one detector is positioned to detect light emitted from the at least two light sources.

Abstract: A wearable pulse oximetry device and associated methods are provided. In some embodiments, the device includes at least two light sources having different wavelengths and at least one detector responsive to the different wavelengths. The device also includes a structure adapted to fixate at a distal end of the wearer's ulna bone at a fixated area. The light sources having different wavelengths and the at least one detector are fixed within, or adjacent to, the structure such that when the structure fixates at the fixated area the light sources and the at least one detector are positioned adjacent to the distal end of the ulna, and the at least one detector is positioned to detect light emitted from the at least two light sources.

Abstract: A pulse oximetry device that is mounted on a wrist strap and fixates an area above a distal end of the ulna with a dome shaped structure. This area is used as measuring area. The measurement is carried out by a detector positioned above the fixated area, that detects light emitted by light sources having different wave lengths that are located at a periphery of the fixated area. Hence, the reflections are measured at neither a reflection mode nor a transmission mode, but are at an angle between 20° and 160° from the emitted light. This mode, termed trans-illumination, allows achieving an excellent signal to noise ratio that for the first time enables continuous and reliable measurement of oximetry data on the wrist.

Abstract: A pulse oximetry device that is mounted on a wrist strap and fixates an area above a distal end of the ulna with a dome shaped structure. This area is used as measuring area. The measurement is carried out by a detector positioned above the fixated area, that detects light emitted by light sources having different wave lengths that are located at a periphery of the fixated area. Hence, the reflections are measured at neither a reflection mode nor a transmission mode, but are at an angle between 20° and 160° from the emitted light. This mode, termed trans-illumination, allows achieving an excellent signal to noise ratio that for the first time enables continuous and reliable measurement of oximetry data on the wrist.

Abstract: There is described a new sensor for optical blood oximetry as well as a method and apparatus in which the new sensor is used. The new sensor includes two point-like light emitters (23,24) positioned in the center of the device in close proximity to each other and at least one and preferably two annular detector terminals (32,39) concentrically surrounding the light emitters. The light sources may, for example, be two laser diodes emitting each monochromatic light within the range of 670 nm to 940 nm. The detector devices are, for example, photodetectors.